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Report number	arXiv:1705.03849
Title	Measurement of basic characteristics and gain uniformity of a triple GEM detector
Related title	Measurement of basic characteristics and gain uniformity of a triple GEM detector
Author(s)	Patra, Rajendra Nath (Calcutta, VECC) ; Singaraju, Rama N. (Calcutta, VECC) ; Biswas, Saikat (CAPSS, Kolkata) ; Ahammed, Zubayer (Calcutta, VECC) ; Nayak, Tapan K. (Calcutta, VECC ; CERN) ; Viyogi, Yogendra P. (Calcutta, VECC)
Publication	2017-08-01
Imprint	2017-05-10
Number of pages	6
Note	Accepted for publication in Nuclear Instruments and Methods in Physics Research Section A, 7 pages, 15 figures
In:	Nucl. Instrum. Methods Phys. Res., A 862 (2017) pp.25-30
DOI	10.1016/j.nima.2017.05.011 10.1016/j.nima.2018.09.009 (Erratum)
Subject category	physics.ins-det ; Detectors and Experimental Techniques
Abstract	Large area Gas Electron Multiplier (GEM) detectors have been the preferred choice for tracking devices in major nuclear and particle physics experiments. Uniformity over surface of the detector in terms of gain, energy resolution and efficiency is crucial for the optimum performance of these detectors. In the present work, detailed performance study of a 10x10 cm^2 triple GEM detector operated using Ar and CO_2 gas mixtures in proportions of 70:30 and 90:10, has been made by making a voltage scan of the efficiency with 106^Ru-Rh beta-source and cosmic rays. The gain and energy resolution of the detector were studied using the X-ray spectrum of 55^Fe source. The uniformity of the detector has been investigated by dividing the detector in 7x7 zones and measuring the gain and energy resolution at the center of each zone. The variations of the gain and energy resolution have been found to be 8.8% and 6.7%, respectively. These studies are essential to characterise GEM detectors before their final use in the experiments.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: © 2017 The Authors (License: CC-BY-4.0)

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